title: Interim observations on benefit/risk of azathioprine versus D-penicillamine in the treatment of rheumatoid arthritis.
mesh_terms: D001172:Arthritis, Rheumatoid / Q000175:diagnosis / Q000188:drug therapy*; D001379:Azathioprine / Q000009:adverse effects / Q000627:therapeutic use*; D004311:Double-Blind Method; D006801:Humans; D008134:Long-Term Care; D008875:Middle Aged; D010396:Penicillamine / Q000009:adverse effects / Q000627:therapeutic use*; D012306:Risk
chemical_list: D010396:Penicillamine; D001379:Azathioprine